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Home >> Hyundai >> 2009 >> Tucson GLS, Automatic >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle System >> Troubleshooting for DTC >> P0721 Output Speed Sensor Circuit Range/Performance >> DTC Detecting Condition
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P0721 Output Speed Sensor Circuit Range/Performance: DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy
  • Speed rationality check
  • Signal circuit is open or short.
  • Sensor power circuit is open
  • Sensor ground circuit is open
  • Faulty OUTPUT SPEED SENSOR
  • Faulty PCM
Enable Conditions
  • Vehicle speed is over 31 Mile/h (50 Km/h) in D, 3, 2, L (A/T range switch) and SP (SPORTS MODE)
Threshold Value
  • If the output from the output speed sensor is continuously 50% lower or higher than the value calculated by vehicle speed sensor.
Diagnostic Time
  • More than 1sec
Fail Safe
  • Locked into 3rd or 2nd gear.
  • Apply an electric current to Solenoid valve
  • Manual shifting is possible (2nd โ†’ 3rd, 3rd โ†’ 2nd)